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Non-blocking primary air speed measuring device

A wind speed measurement, non-clogging technology, applied in measurement devices, fluid velocity measurement, velocity/acceleration/impact measurement, etc., can solve problems such as the inability to fundamentally eliminate clogging

Inactive Publication Date: 2007-09-19
高明逊
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The anti-blocking measures are concentrated on the head of the pressure-taking pipe, which cannot fundamentally prevent the occurrence of blockage

Method used

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  • Non-blocking primary air speed measuring device
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Examples

Experimental program
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Effect test

Embodiment 1

[0021] As shown in Figure 1, the non-blocking primary wind speed measuring device, the air flow containing pulverized coal flows in the primary air duct 1 of the power plant, the full pressure pressure pipe 2 and the static pressure pressure pipe 6 are installed on the primary air pipe of the power plant, A differential pressure transmitter 4 is installed between the pressure tube and the static pressure tube. The range of the differential pressure transmitter is 0-1.6KPa, the power supply is 24VDC, and the output is 4-24mA. The pressure-taking pipe is connected to the same pressure-receiving gas tank, and a control valve and a throttle valve 8 are installed on the pipeline. The pressure-stabilizing gas tank provides constant-velocity weak airflow along the full-pressure pressure-taking pipe and the static pressure-taking pipe to the pressure-taking port 2 , the pressure-stabilizing air tank 5 is connected to the instrument wind compressed air source, and the air is stored in t...

Embodiment 2

[0024] As shown in Figure 1, the non-blocking primary wind speed measuring device, the primary air pipe 1 of the direct blowing system of the newly built power plant has a mixed air flow of air and pulverized coal, and the full pressure pressure pipe 3 and the static pressure pressure pipe 6 are installed in the primary wind pipe of the power plant. On the tube, a differential pressure transmitter 4 is installed between the full pressure pressure tube and the static pressure tube. The range of the differential pressure transmitter is 0-1.6KPa, the power supply is 24VDC, the output is 4-24mA, The pressure-taking pipe and the static pressure-taking pipe are connected to the same regulated gas tank 5, and the constant-velocity weak airflow provided by the regulated gas tank flows along the full-pressure pressure-taking pipe and the static pressure-taking pipe to the pressure-taking port 2, and the differential pressure becomes The dynamic pressure value collected by the transmitte...

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Abstract

The present invention relates to the measuring of the quantity of flow or the flow speed, a one-time wind speed measuring device without blockage, a total pressure tube and a static pressure tube. A differential pressure transducer is positioned between the total pressure tube and the static pressure tube, and small air flows in the total pressure tube and the static pressure tube in the direction of the pressure obtaining port. The small air flow can resist the diffusing of the coal powder in to the pressure tube. The present invention which is not in a traditional thinking mode solves the problems of blocking skillfully and assures that the pneumatics property of the pressure obtaining elements is not changed and improves the measuring precision. The method for measuring in the present invention brings convenient for users without on-the-spot demarcating and debugging. The device and method having no requirement of dust concentration in the present can be used for measuring a direct-flowing system or sending powder to replace the air and can also be used in other occasions of higher dust concentration.

Description

Technical field: [0001] The invention relates to the field of flow velocity or flow measurement, in particular to a dust-laden air flow measurement device. Background technique: [0002] The importance of primary wind speed measurement for power plant boilers has been widely recognized. It is an indispensable and important parameter for boiler combustion adjustment, and it has important significance for combustion stability, economy and reliability. However, its measurement has always been a problem. Originally, the static pressure was used to monitor the primary wind. In recent years, it is more scientific and reasonable to directly measure the primary wind speed. The existing devices for directly measuring the wind speed are as follows: [0003] It is directly measured with ordinary dynamic pressure taking components and differential pressure transmitters, and it turns out that this method cannot be applied to dusty primary air. [0004] The total pressure is taken throug...

Claims

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Application Information

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IPC IPC(8): G01P5/00G01P1/00G01F1/00G01F15/00
Inventor 高明逊
Owner 高明逊
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